CVE-2026-56864GO-2026-6180BIT-GOLANG-2026-56864
Ignore unrelated, unauthenticated hashes in Lookup in golang.org/x/mod/sumdb
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 1.25.13, 1.26.6, 1.27.0-rc.3, 0.40.0
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: yes
- Technical impact: partial
Summary
A malicious GOSUMDB was capable of serving arbitrary module content not contained within the transparency log. This attack allows for a coordinating GOPROXY and GOSUMDB to serve a client malicious module content that cannot be detected by evaluating the transparency log. In order to determine if you have been affected: rm -r go.sum go.work.sum vendor/ && go mod tidy
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- cmd/go
fixed in 1.25.13; From 1.26.0-0 · fixed in 1.26.6; From 1.27.0-0 · fixed in 1.27.0-rc.3
- golang.org/x/mod/sumdb
fixed in 0.40.0
- toolchainGo
fixed in 1.25.13; From 1.26.0-0 · fixed in 1.26.6; From 1.27.0-0 · fixed in 1.27.0-rc.3
- golang.org/x/modGo
fixed in 0.40.0